Interleukin-4 (IL-4), also known as B-cell stimulatory factor 1, is a pleiotropic cytokine which interacts with multiple cell lineages, including T cells, fibroblasts and haematopoietic cells, and is one of the most important factors involved in B cell IgG1 and IgE class switching. IL-4 acts as a regulator of low affinity Fc receptor for IgE (CD23) expression on both lymphocytes and monocytes.
Source:Recombinant protein corresponding to mouse Interleukin-4 expressed in E. coli.
Molecular Weight:~13.5kD (120aa)
Biological Activity:The ED50 was determined by the dose-dependent proliferation of murine HT-2 cells is <2ng/ml, corresponding to a specific activity of >5x105units/mg.
Applications:Suitable for use in ELISA, Western Blot, Functional Assays. Other applications not tested.
Recommended Dilution:ELISA: 0.2-0.4ng/wellWestern Blot: 1.5-3ng/laneOptimal dilutions to be determined by the researcher.
Endotoxin Level: <1EU/ug
Storage and Stability:Lyophilized powder may be stored at -20°C. Stable for 12 months after receipt at -20°C. Reconstitute with sterile ddH2O. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Reconstituted product is stable for 6 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
仕様
Size：20ug
Source Antigen：Recombinant, E. coli
Grade：Highly Purified
Purity：~98% (SDS-PAGE, HPLC)
Form：Supplied as a lyophilized powder. No preservative added. Reconstitute with 200ul sterile ddH2O.
